Directional fracture behavior and stress evolution process of the multi-slit charge blasting

doi:10.1016/j.soildyn.2021.107037

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Directional fracture behavior and stress evolution process of the multi-slit charge blasting
	Ding, Chenxi 4,5; Yang, Renshu 3,4,5; Xiao, Chenglong 3; Chen, Jianhua 2; Wang, Desheng 4,5; Gong, Min 4,5; Feng, Chun 1
刊名	SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
	2022
卷号	152 页码:13
关键词	Multi-slit charge Directional fracture Crack propagation Stress evolution Blasting vibration
ISSN号	0267-7261
DOI	10.1016/j.soildyn.2021.107037
通讯作者	Feng, Chun(fengchun@imech.ac.cn)
英文摘要	The multi-slit charge developed from the traditional double-slit charge has more and more engineering applications in roadway blasting and excavation. In this paper, numerical simulation and model experiments are used to compare the dynamic behaviors of double-slit/three-slit charge blasting in crack propagation, stress evolution and blasting vibration. The research results show that the directional fracture effect at the borehole middle and borehole bottom in the slit charge blasting is the best, followed by the directional fracture effect at the borehole orifice, and the length of the directional crack formed along the slit direction at the borehole middle is the largest. Compared with the double-slit charge blasting, the dynamic stress intensity factor of the directional crack at initiation stage and early propagation stage in the three-slit charge blasting is smaller, and the directional cracks formed are shorter. In addition, the effective stress evolution and blasting vibration attenuation of the gauging points along the slit direction are affected by slit number and cross-section position. The effective stress and blasting vibration of gauging points at the borehole bottom in the slit charge blasting are significantly larger than those of gauging points at the borehole orifice. For the three-slit charge blasting, the model experiment finds that the directional crack deflected to the side of protected rock mass during the propagation process. The occurrence of such deflection phenomenon is likely to cause overbreak of rock mass, which is not conducive to the formation of a straight profile surface in the rock roadway excavation.
资助项目	China Postdoctoral Science Foundation[2020M680354] ; National Natural Science Foundation of China[51934001] ; Fundamental Research Funds for the Central Universities[FRF-TP-20-044A1]
WOS研究方向	Engineering ; Geology
语种	英语
WOS记录号	WOS:000744287700001
资助机构	China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/88399]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
通讯作者	Feng, Chun
作者单位	1.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China 2.Min Co Shougang Grp Co Ltd, Xingshan Iron Mine, Qianan 064404, Peoples R China 3.China Univ Min & Technol Beijing, State Key Lab Geomech & Deep Underground Engn, Beijing 100083, Peoples R China 4.Univ Sci & Technol Beijing, Minist Educ High Efficient Min & Safety Met Mines, Key Lab, Beijing 100083, Peoples R China 5.Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Ding, Chenxi,Yang, Renshu,Xiao, Chenglong,et al. Directional fracture behavior and stress evolution process of the multi-slit charge blasting[J]. SOIL DYNAMICS AND EARTHQUAKE ENGINEERING,2022,152:13.
APA	Ding, Chenxi.,Yang, Renshu.,Xiao, Chenglong.,Chen, Jianhua.,Wang, Desheng.,...&Feng, Chun.(2022).Directional fracture behavior and stress evolution process of the multi-slit charge blasting.SOIL DYNAMICS AND EARTHQUAKE ENGINEERING,152,13.
MLA	Ding, Chenxi,et al."Directional fracture behavior and stress evolution process of the multi-slit charge blasting".SOIL DYNAMICS AND EARTHQUAKE ENGINEERING 152(2022):13.